Apparatus for treating liquids with gas.



T. K. IRWIN.

APPARATUS Tou TABATTNG LIQUTDS WITH GAS.

APPLIUATION FILED DEG.12, 1913. 1,129,682, Patented Feb. 23, 1915.

2 SHEETS-SHEET 1.

I @n1/enfer T. K.. IRWIN.

'APPARATUS POR TREATING LIQUIDS WITH GAS.

APPLICATION FILED DEG. 12, 191,3.

Patented Feb.'23, 1.915.

2 SHEETS*SHEET 2.

STATES PATENT @FFICE -'IHOIMIAS'K'EMPAY IRWIN, 0F LONDON, ENGLAND.

APPARATUS FOR TREATING LIQUIDS WITH Patented Feb. 23, 1915.

Application 1ed December 12,' 1913. Serial No. 806,360.

To all whom it may concern:

Be it known that I, THOMAS KEMPLAY IRWIN, a subject of His Majesty theKing of England, residing at 5 London Wall Buildings, in the city ofLondon, Kingdom of England, have invented certain new and usefulImproved Apparatus for Treating Liquids with Gas, of Which the followingis a specification.

This invention relates to an improved apparatus for treating liquidswith gas. The

improved apparatus is suitable for almost all purposes Where it isdesired to aerate liquids, such for instance as in the treatment ofwaste liquids or sewage etliuent which has to be disposed ofordischarged into a stream, or in other manufacturing processes, such asthe manufacture of mineral Waters, in creameries and the like.

Ithas heretofore been proposed to employ centrifugal machines forfiltering and straining liquids of various kinds, including sewage.

Noiv according to my invention, I employ a hydro-extractor or likecentrifugal 1r'machine for treating liquids with gas. The` machine hasan annulus of porous material arranged therein in a suitable manner,such for instance as hereinafter described.

As my invention is particularly suitable for'the treatment of sewage andsewage effluent I Will hereinafter describe the same as applied to thisparticular purpose. l

Referring ,to the accompanying dravvings,fFigure l isa diagrammaticsectional ,elevation illustrating one suitable form of cage; Figs. 2 to5 are similar views illustrating further modified forms-designed for a.like purpose; and Figs.-6 and 'T are two detail views showing insectional elevation and plan respectively mechanism hereinafter referredto. i

In carrying out my invention I employ a hydro-extractor for treatingliquids with gas. 'The device as is usual comprises a cylindrical orother suitably Vshaped cage a conveniently perforated or open wheredesired and mounted on a central spindle Z) and it is for my purposeprovided With-a surrounding annulusv 'of porous material through 'whichthe liquids to be filtered and aerated musty pass. The said porous me--dium may be a series of layers of perforated plates or ganzes, sand orother loose material suitably arranged around theinside of the cage a asshown at c in Fig. 1, and such joint between the an annulus of cement,porcelain, terra-cotta,l

or other like suitable solid porous medium which may either be arrangedin the'form of a solid ring or be built up from a pluralityvof-segmentsd as shown by Way of eX- ample in Fig. 2. If desired such a solid porousmedium d may as shown in Fig. 3 be combined with a layer of sand. orloose material c. Where a solid porous medium is employed this may besuitably carried in separate segmental frames or carriers, so that itcan be readily removed or repla ed when desired; such frames making a tiht porous medium and the cage. i y

In some cases I may as shown in Fiig. i providea suitable form ofdischarge valve vegnvhich Svould be suitably arranged to slide auvay romor otherwise coperate with and open porps f in the cage a when it isdesired or deposit consists in providing a slidingA ring g (or segmentsof a ring) around the outside of the cage which when lifted or movedlaterally or pivotally'would uncov r ports in the said cage of anysuitable shaxie and size as Will be readily understood. The medium c orits contents, may then be Washed out with (liquid or chemicals, thedischarge taking place through these ports.

As before stated provision is generally made for cleaning the'device bymaking the porous ringor segments removable, but if desired suchcleaning maybe effected Without! removal by means of suitable scrapingor Wc bling devices which are so arranged that t can be brought intosuitable juxtaposition lvvith the inner surface of the annulus when thecage is in motion. Chemicals may als'bbe used for the purpose either inpowder or fluid form for cleaning the porous medium. These may bbintroduced periodically or continuously, aliid separately or. whenpracticable, in admixture with-the fluid undergoing treatment. p

Oxidation maybe indreasedfor treatment "effectef'l by th'ei introduction-of other gases los' drawings.

this means, and the rate of flow of the air or other gases may becontrolled to bring about such changes. Again if desired the airor othergases may be forced into the liquid under'pressure.

Suitabledevices byv means of which the apparatus may be made continuousin its action are shown in Figs. 6 and 7 of the As shown I provide asuitable arm h'Nvhich is independently and movably mounted in relationto the cage and which carries a tubular device having a shaped end forremovingv the deposit or a portion of the'loos'e porous medium togetherwith the deposit and also afeed device or conduit Iifor simultaneouslydepositing fresh porous material in place of that removed by the member'e'. Where such device is employed an inner annulus of loose porousmaterial should always be provided a-s it is not practicable to removeal thin deposit from the cage or solid porous lining.

lAerating and filtering devices constructed according to my inventionhave been found to'give excellent'results in treating sewage emuent. Inthis connection apart from the importance of oxidizing the putrescibleelements the presence of air in the eiiluent is -necessary in order notto destroy fish life in streams, as it has been found that more dam,-age is done by the absence of air (or oxygen) in Waste liquids than bythe presence of danger-ous matter in suspension or solution, and suchcentrifugal machines are used not only to aerate but to oxidize a largeproportion of the oxidizable matter in such Waste liquids. `These goodresults are caused by the drawing in of air with the liquid being driventhrough the porous medium as both are broken up into minute particleswhen passing through the medium and the contact is consequently intimateand the absorption or admiXture most complete.

WhatI claim as my invention and desire to secure by Letters Patent ofthe United States is 1. In liquid aerating apparatus, a hydroextractoror like centrifugal machine comprising a rotating cage, an annulus orlWall of a loose and removable porous medium for the purpose described,and means for simultaneously removing and adding mate- Q. In liquidaerating apparatus, a hydroextractor or like centrifugal machinecomprising a rotatingcage, an annulus or Wall of filtering material forthe passage of the liquid to be aerat'ed, and means for cleaning thesaid Wall substantially as described, said cleaning mea-ns being furtheradapted for simultaneously adding material to and removing material fromthe wall.

3. In liquid aerating apparatus, a hydron extractor or like centrifugalmachine coinprising a rotary cage, an annulus or Wall of loose porousmedium for the passage of the liquid to be aerated and means forremoving and replacing the said porous material sub stantiallyasdescribed.

. In testimony whereof I have signed this specification in the presenceof two subscribing witnesses.

a. THOMAS KEMPLAY IRWIN.

7Witnesses:

J. S. VITHERS, C. Gr. W'ITHERS.

